What are the advantages of faster ram?

today, I swapped my generic 6 gb of 1333 MHz generic ram, for 12 gb of 1600 MHz corsair dominators for $300. They are supposedly overclockable to like 2100 MHz or something like that. What are the real advantages of such high end ram like that. Even if I overclock it fully, will I notice a difference? I use adobe cs5.5 suite mostly.